package chapter05.E4;

public class E4 {
    public static void main(String[] args) {
        String s = "itcast";
        System.out.println("将it替换为cn.it的结果"+s.replace("it","cn.it"));
        String s1= "    i t c a s t   ";
        System.out.println("去除字符串前后空格的结果"+s1.trim());
        System.out.println("去除字符串中所有空格的结果"+s1.replace(" ",""));
    }
}
